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85717 (1998 SY56)
Classification: Main-belt Asteroid          SPK-ID: 2085717
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1630118932367466 3.3505e-08  
a 2.348017907820368 9.0418e-09 au
q 1.965263063312785 7.8571e-08 au
i 5.247975099247879 4.7481e-06 deg
node 154.8547037644285 4.494e-05 deg
peri 298.6054948964134 4.7832e-05 deg
M 184.6170249859963 1.7106e-05 deg
tp 2459240.729182692214
(2021-Jan-26.22918269)
6.4088e-05 TDB
period 1314.166929548286
3.60
7.591e-06
2.078e-08
d
yr
n .273937801892292 1.5823e-09 deg/d
Q 2.730772752327951 1.0516e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1113  
   data-arc span      7241 days (19.82 yr)  
   first obs. used      1998-09-14  
   last obs. used      2018-07-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55033  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-04 03:06:37  

Additional Information
 Earth MOID = .988348 au 
 Jupiter MOID = 2.45231 au 
 T_jup = 3.536 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.8   n/a MPO436374  
diameter diameter 1.929 km 0.273 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.626   0.179 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85717 (1998 SY56)          Discovered 1998-Sep-17 by LONEOS at Anderson Mesa
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

Alternate Designations
 1998 SY56 = 2000 EU87 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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